Dunskey Castle Series by Jane Stain

Tavish was the best boyfriend Kelsey ever had, but seven years ago he disappeared. She coped with her heartbreak by finishing her doctorate in Celtic Artwork, and now her career is taking off. Except Tavish keeps showing up at her job sites and butting into her business - all the while wearing that stupid sexy kilt. But she's here to see the ruins, not Tavish. So she'll just have to show him who's boss at this site... moreTavish was the best boyfriend Kelsey ever had, but seven years ago he disappeared. She coped with her heartbreak by finishing her doctorate in Celtic Artwork, and now her career is taking off. Except Tavish keeps showing up at her job sites and butting into her business - all the while wearing that stupid sexy kilt. But she's here to see the ruins, not Tavish. So she'll just have to show him who's boss at this site. Because under these cliffs at Dunskey Castle it is rumored lies the ancient palace of the kings of Alba. Gggrr. Why does he seem to know more about it than she does? less

Sasha just got her dream job at a dig in the highlands of Scotland. Where her friends ply her with celebratory champagne, throw a plaid cloak over her business suit, and take her to the 13th century to do original research on the dig site. She meets gorgeous highlander Seumas there, and — wait, is this a good idea?

A call from an old friend stirred up feelings Amber thought she had buried years ago. Kelsey wanted help at a dig under an old Scottish castle - with Tomas's twin brother. She couldn't believe it. If his brother was back in their lives, wouldn't Tomas be, too? She didn't jinx it by asking Kelsey that. Nope, but she was on the next flight.

Jaelle was furious at John. He'd left her for another woman. He'd also left all this junk behind. Wait, this helmet was interesting. Was it Roman? She had to try it on. Whoa, dizzy. Huh? Was this a cleverly disguised virtual reality headset? Because that looked like Hadrian's Wall. And the Romans on the other side didn't look friendly.

Deirdre grew up in the 14th Century knowing about time travel. Her parents' friends Tavish and Kelsey were from the 21st Century. Now she was on her first time travel assignment for the Druids. It was challenging. Sure, she had her magic dagger, but he wasn't cooperating.Talorac felt anxious about this meeting. A summons to the sacred grove had always meant the druids would perform their woad magic to prepare him for battle... moreDeirdre grew up in the 14th Century knowing about time travel. Her parents' friends Tavish and Kelsey were from the 21st Century. Now she was on her first time travel assignment for the Druids. It was challenging. Sure, she had her magic dagger, but he wasn't cooperating.Talorac felt anxious about this meeting. A summons to the sacred grove had always meant the druids would perform their woad magic to prepare him for battle. So he was in no way prepared to make the acquaintance of the woman he found there with them. Deirdre was beautiful, and a warrior, and from the way she was flitting around the grove, she was the most powerful druid he had ever heard of in his life. less

Jessica was grateful. Lauren had arranged this business trip to Scotland. But Lauren's friend Kelsey was beyond weird. Why did they need to be in costume to tour the castle ruins? What did Lauren need that dagger for? And Lauren kept zoning out on the tour bus, mumbling to herself and making Jessica and Katherine exchange worried glances.Leif had assumed Father's duties as Laird of Cresh Manor four months ago, when the fever took both his parents... moreJessica was grateful. Lauren had arranged this business trip to Scotland. But Lauren's friend Kelsey was beyond weird. Why did they need to be in costume to tour the castle ruins? What did Lauren need that dagger for? And Lauren kept zoning out on the tour bus, mumbling to herself and making Jessica and Katherine exchange worried glances.Leif had assumed Father's duties as Laird of Cresh Manor four months ago, when the fever took both his parents. Druids had sent the fever to his town, so the people said. Druids from the mysterious Druid castle to the North. They also said Druids sent the three beautiful women who had wandered into town, but Leif didn't believe a word of that. less

After a year in Luag's medieval Scotland, Katherine was finally home. Hot showers! The Internet! Fast food! So why did she even listen when he begged her to help him go back? It was kind of fun having him here in her time and for once being the one who understood their surroundings. But that man who kept showing up. Was he the druid from the battlefield? After all, Lauren and Jessica were still back in 1411. And Kelsey could get her home...